Pulverizing apparatus



J.E.KENNEDY.

PULVERIZING APPARATUS. APPLICATION FILED r'mz, 191a.

' 1,356,292. Patented 00a 19, 1920.

7 SHEETS-SHEET I.

, E J r\ a -6 i9 WITNEssEse' vmon ik/zm ATTORNEY J. E. KENNEDYfPULVERIZING APPARATUS.

APPLICATION FILED FEB. 2 191a.

1,356,292, I Patented Oct. 19, 1920.

1 SHEETS-SHEET Z.

Wirzesses:

J. E. KENNEDY.

.PULVERIZIYNG APPARATUS- APPLICATION FILED FEB. 2, 1918] Patented Oct.19,1920.

7 SHEETSSHEET 3.

Wahzesses J. E. KENNEDY.

PULVERIZING APPARATUS.

,APPLICATION' FILED FEB. 2, i918.

1,356,292, Patented Oct. 19,1920.

J. E. KENNEDY;

I PULVERIZINGAPPARATUS.

APPLICATION FILED FEB-2, 1pm.

1,356,292. y I 2mm Oct. 19,1920.

'1 SHEETS-SHEET 5.

Wifizsses: W W,

J. E. KENNEDY.

PULVERIZING APPARATUS.

APPLICATION FILED FEB- 2 1918.

1,356,292." Patented 0 n- 19,1920.

1 SHEETS-SHEET 6 TVilhases: y zw J. E. KENNEDY. PULVERIZING APPA HATUS.APPLICATION FILED FEB- 2, I918- 1,35 ,292. I ,Patented 00p 19,1920.

ISHEETS-SHEET I.

PATENT OFFICE.

JOSEI PI-I E. KENNEDY, OF NEW YORK, N. Y.

PULVERIZING APPARATUS. I

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, JosEPH E. KENNEDY, a citizen of the United ,States,and a resident of the borough of Manhattan, city, county, and State ofNew York, have invented certain new and useful Improvements inPulverizing Apparatus, of which the following is a specification.

My improvements relate to the class of grinding machinery in which rock,ore, coal, or analogous crude material is comm'inuted by means ofcrushing rollers traveling over and inside an attrition ring or die,between which and said rollers the raw material is fed, to be removed byair blast as fast as reduced to the proper degree of fineness. Theinvention consists in the specific construction, combination andarrangement of parts herein described and claimed, distinctive featuresbeing the central induction of the air vehicle, the means for suspendingand rotating the crushing rollers, the method of lubrication, the meansof feeding the raw material to and between the crushing rollers and theattrition ring, and other details, all as I hereinafter fully set forth.

In the accompanying drawings,

Figure 1, is a diagrammatic view illustrating an installation in whichmy improved pulverizer forms a componentpart;

Fig. 2, is an elevation of what may be designated as the feed side of myimproved pulverizer; i

Fig. 3, is a central vertical sectional elevation taken upon plane ofline 3- 3, Fig. 2;

Fig. 4, is a central vertical sectional elevation taken upon plane ofline 4-4, Fig. 3; r Fig. 5, is a horizontal sectional elevation takenupon plane of line 5-5, Fig. 3;

Fig. 6, is a horizontal section taken upon plane of line 6-'-6, Fig. 3;

Fig. 7 is a top view of a portion of the drive head showing one of themounts for 7 one of the crushing roller spindles;

\ Fig. 8, is a sectional elevation taken upon plane of line 8-8, Fig. 7

"Fig. 9, is a top view of a portion of the drive head showing one of themounts for one of the plow spindles;

Fig. 10, is a sectional elevation taken upon plane of line 10-10, Fig.9.

Fig. 1, represents diagrammatically the general relationship of myimproved roll pulverizing apparatus in and to a system for the reductionof raw material and the Patented Oct. 19, 1920.

Application filed February 2, 1918. Serial No. 215,052..

collection of the product, by reference to which it will be seen thatmypulverizer P, 1s lnterposed in a forced air circulation generated by theexhaust E, which forces the the clarified air being returned through theconduit c, tothe lower portion of the pulverizer P, to be again used asa vehicle for the removal of the impalpable powder from the crushingchamber as hereinafter set forth.

The raw material is fed from the primary bin A, through a spout a, tothe feed hopper 7, from which it is transferred by positive means (as bythe reciprocating forwarder 7) through the passage F, to the floor 9",of the reduction chamber R, as will be understood by reference moreparticularly to Fig. 3, ofthe drawings. The reduction chamber R, isessentially cylindrical in configuration, being formed within the trunksection p, of the pulverizer casing, said trunk section p, beingsupported upon foundation piers p. Said trunk section 20, is formed witha hollow central bearing post 12 upon and in which the drive head D, andits drive shaft (l, are mounted, the central bearing post 79 beingessentially a sleeve extending down to the bottom plate of the trunksection 37, the lower part of which contains the air inlet compartmentI, situated immedia ately below the floor r, of the reduction chamber R,and communicating with the latter through a central delivery aperture2'. The lower extremity of the return air conduit c, from the collectorsC, C, connects directly with the mouth 2", of the air inlet compartmentI.

12 is an annular extension of the casing fitting upon the top of thetrunk section 1), and forming the base support for the shell 39*, whichsurmounts the reduction compartment R, and incloses the drive head D,and connections,-the shell 17*, being provided with a hood 30 formedwith an exit conduit 70, having a downward extension 10 into the shell10*. Manholes in the shell 39*, and

hood p provided with suitable closures,

afford access when necessary to the inclosed' the air exhaust device E,which latter may the rocker bearing J.

be of any desired or well known type or constar'uetion,- that indicatedin the drawings being a rotary fan exhaust driven by a belt 6', inengagement with a pulley m, on the main power shaft M, Fig. l.

The lower extremity of the drive shaft 41, rests upon an adjustableseatcl, mounted on a cap bracket (l secured to the lower part of the gearcasing 12 which is secured in turn to the lower side of the trunksection 71, as shown in Figs. 3 and 4:. The gear casing p is formed witha pocket for theaccommodation of the lowest portion of the miter pinionm, on the counter shaft M, which pinion meshes with the gear (Z securedto the drive shaft 03, said pocket also performing the function of awell for the lubricating oil.

The inner journal of the counter shaft M, is seated in a bearing 32formed for it in the gear casingv p while its outer journal is supportedin a bearing 17, on the pillow block T. Secured to the countershaft is alarge driven pulley m connected by a belt m (Fig. 1) with a still largerdrive pulley m*, on the main power shaft M. The latter also has thedrive pulley m, connected by belt 6, with the driven pulley 0 on theexhaust E. A small drive pulley m, on the countershaft M, actuates abelt 7, which transmits motion to the driven pulley f, on the shaft 7,by means of which the feed mechanism is operated. Another small drivepulley m, on the countershaft M, by means of the belt m and drivenpulley 1, operate the pump L, by which a forced circulation of thelubricant is maintained as and for the purpose hereinafter set forth.

N, is an attrition ring seated in the upper part of the trunk section10, of the casing, its exterior periphery being beveled slightly to fita correspondingly inclined concavity p, in said trunk section 3?, asshown in Figs. 3 and 4. The attrition ring N, is held to its seat bywedge blocks n, positioned in recesses formed for them in the annularbase extension 39 on top of the trunk section p. The function of theattrition ring N, is to act as an anvil die, or tread way for thecrushing rollers which are pivotally suspended upon the drive head D,which is rigidly mounted as before intimated on the upper extremity ofthe drive shaft d.

The construction and mounting of the crushing rollers K, will beunderstood more particularly by reference to Figs. 7 and 8. Thus thetire of each roller K, is secured to a hub section 70, forming the lowerpart ofv a rotatable sleeve K, which is mounted on the non-rotatablespindle J, ri idly secured to Tfie latter is fulcruined on the trunnionshaft j, supported in bearings d, d", on the drive head D, which latteris recessed, as at (F, between said bearings d d to allow the rockerbearing J, to conform to the inclination imparted thereto by the rollerK, when deflected by the material under treatment. Stops (1", pl, on thedrive head D, limit the outward thrust of the rollers K. Key pins j, j,lock the spindle J, to therocker bearing J, preventing its turningtherein, as will be seen by reference to Fig. 7

An annular shoulder j on the non-rotatable spindle J, supports therotatable sleeve K, and roller K, the sleeve K, being formed for thepurpose with the recess 70 and pro -vided with the cap piece/a whichaffords ence to Fig. 8. j 3' are wear and spacing.

washers or plates, interposed between said annular shoulder j and theopposed hearing surfaces on the sleeve K. I prefer to secure the tire ofthe roller K, to the hub section 7:, of the rotatable sleeve K, bymaking said hub section is, conoidal and threading it peripherally, thetire section of the roller K, being correspondingly formed and threadedto receive the hub section 70. The pitch of the thread is, is reversedto the di rection of rotation of the roller K, so that the workingstrain on the latter tends to preserve and tighten the connectionbetween the parts.

The non-rotatable spindle J, is formed with a central duct j with whichthe lubricant cup 3' communicate-s. Said' central duct j, extends downto the well 70*, in the tire section K, below the hub section 7:, and italso, has lateral ducts 70", which distribute the lubricant atintermediate points between the rocker bearing J, and said space it", inthe roller K.

Thus constructed and mounted the crushing rollers K, operate with aminimum amount of frictional resistance, and are free to adaptthemselves to the irregularities of the raw material fed between themand the attrition ring N.

This feed to the rollers of the material to be reduced is effected bymeans of the plows S, which take up and agitate the material introducedthrough the inlet 7, to the floor 1', of the reduction chamber R. Theplows S, serve the material to the crushing rollers K, in advance of,and in the line of rotation of said rollers, elevating the material fromthe floor 1', of the reduction chamber R, to the peripheries of therollers K, by which it is pressed against the attrition ring N, thematerialbeing returned to the rollers untilreduced sufiiciently to betaken up by the air vehicle as hereinafter set forth. The plows not onlythus raise and deliver the material to and between the crushing rollersK, and the attrition ring N, but they also act as agitators tostir upthe material and effect a relatively even distribution thereof to theseveral rollers,--five of which are shown in the drawings as positionedand suspended in equidistant relationship upon the drive head D,although any desired number may be provided, as may be found mostexpedient.

The plows S, are arranged intermediate between adjacent crushing rollersK, so that a like number are provided, each secured to the-lowerextremity of its own suspender rod S, the latter being secured to thedrive head D, as shown particularly in Figs. 9 and 10. The plow S, is ineach case attached to a bracket sl eve s, which fits upon the reducedportion s of the suspender rod S, being clamped l y the nut 8 againstthe shoulder .9 By this means the bracket sleeve 8, and plow S, may besecured in any prescribed position around the suspender rod S, so as -toregulate approximately the scope of action of the plow S, with relationto the attrition ring N, and

crushing rollers K. a j

The upper portion of the Suspender rod S, passes through bearings d dpendent from the drive head D, and a lock screw (Z may be provided bywhich to secure the suspender rod S, rigidly in its prescribed position.The upper end of the suspender rod S, also has a reduced portion, 8 towhich is spline-connected the hub h, of an adjusting arm H, by means'ofwhich the lateral scope of action of the plow S, may be convenientlyvaried and regulated with accuracy from above,said adjusting arm H,

being formed forthe purpose with a concentric slot it, through which thescrew stud (Z on the drive head D, protrudes as shown in Fig. 9, a locknut (Z being provided to hold the adjustment, which is further in suredby the binding screw (Z Vertical adjustment of the suspender rod S, isprovided for. by the spline-connection between the hub h, of theadjusting arm H, and the reduced upper portion of the said rod S, aswill be understood by reference to Fig. 10, by which it will be seenthat the upper extremity of said rod S, is screw threaded, forengagement with the nuts s s, the lower one of which, 8 bears againstthe hub h, of the adjusting arm H, (said hub resting in turn on thedrive head D) while the upper one s, acts as a lock nut. It will thus beseen that ample provision is made for.

regulating and controlling the position and action of each plow S.

The floor r, of the reduction chamber- R.-

the conduit 0, communicates directly with the mouth or inlet 2', to theair compartment I, beneath the reduction chamber R, delivering the airthereto by pressure de rived from the exhaust E, said air blast havingbeen clarified by the precipitation of solid matter therefrom in thecyclone collectors C, C. This clarified air vehicle reenters thereduction chamber R, through the aperture 2', concentric with the hollowcentral bearing post p forming part of the trunk section 39, of whichthe casing of air compartment 1, also forms a part.

Vithin the reduction chamber R, the central opening 2', is divided byradial partitions, 2' 2' and flanked peripherally by tangentialdeflectors i i ,"inclined in the direction of rotation of the drive headD, and against the direction of rotation of the crushing rollers K.These radial partitions 2' and tangential deflectors 2' may form a partof the trunk section p, as shown in thethe deflectors 27 and the 'ets ofair im )inx e a J l 1:

against the material agitated by the plows diagonally across the path ofthe latter but also in the same general direction so that there can beno back action, pressure or resistance. Thus directed the air vehicle isbest adapted to take up and conveyaway the material comminuted to thedegree of lightness prescribed by the strength of the blast orcirculatory air system. Hence by varying'the force of the air draft andpressure created by the exhaust mechanism the weight of the particlestaken from the reduction chamber may be regulated according torequirements.

This centrifugal air blast in the reduction chamber R, is an importantfactor in my pulverizer, and most effective because it tends constantlyto aid in the return of partially reduced material to and in front ofthe crushing rollers, while sifting out and carrying away thesufliciently comminuted material to be eliminated from the air currentin the cyclone collectors.

The pump L, draws the lubricant from the well 79 of the gear casing 79throughthe pipe Z, and forces it up through the pipe Z to the top of thedrive shaft (2, delivering it to the central duct 03, formed therein, bywhich it is delivered by the lateral ducts d, to the upper bearing d, in

, the central bearing post 32 to return through the latter to the lowerbearing 1),

and to the gear chamber 10 and well 19. By this means the drive shaft03, and gears 03, m, are positively, practically automatically, andeffectually lubricated.

Vhat I claim as my invention anddesire to secure by Letters Patent is,

1. In pulverizing apparatus ofthe character designated, in combination,a fixed attrition ring, rotatable crushing rollers opposed to saidattrition ring and mounted on traveling spindles, means for feedingmaterial to and between said attrition ring and crushing rollers frombelow the same, and tangential deflecting means positioned below andcentrally as related to said attrition ring for directing air underpressure centrifugally beneath and between said crushing rollers andattrition ring, for the purpose described.

2. In pulverizing apparatus of the character designated, in combination,a fixed attrition ring, rotatable crushing rollers op posed to saidattrition ring and mounted on traveling spindles, means for feeding material to and between said attrition ring and crushing rollers from belowthe same, and means positioned below and centrally as related to saidattrition ring for directing air under pressure centrifugally andtangentially beneath and between said crushing rollers and attritionring, for the purpose described.

3. In pulverizing apparatus of the character designated, in combination,a fixed attrition ring, rotatable crushing rollers opposed to saidattrition ring and mounted on traveling spindles, means for feedingmaterial to and between said attrition ring and crushing rollers frombelow the same, and means positioned below and centrally as related tosaid attrition ring for projecting air under pressure centrifugally andtangentially toward the direction of travel of said rollers but opposedto their direction of rotation, beneath and between said crushingrollers and attrition ring, for the purpose described.

4.. In pulverizing apparatus of the character designated, incombination, a fixed attrition ring, rotatable crushing rollers opposedto said attrition ring and mounted on traveling spindles, means forfeeding material to and between said attrition ring and crushing rollersfrom below the same, plows for agitating said material, and meanspositioned below, and centrally as related to said attrition ring forprojecting air under pressure centrifugally beneath and between saidcrushing rollers and attrition ring, for the purpose described.

5. In pulverizing apparatus of the character designated, in combination,a reduction chamber, a fixed attrition ring positioned therein, crushingrollers rotatably mounted to act in conjunction therewith,

means for feeding raw material to said reduction chamber, plows foragitating the raw material and feeding same to the crushing rollers, andmeans positioned centrally with relation to said attrition ring forprojecting air under pressure into said reduction chamber centrifugallyand tangentially, 1

for the purpose described.

6. -In pulverizing apparatus of the character designated, incombination, a reduction chamber, a fixed attrition ring positionedacter designated, in comgination, a reduction chamber, means for eedingraw material thereto, a fixed attrition ring positioned in saidreduction chamber, a central bearing sleeve extending therethrough, adrive shaft and drive head mounted in and on said central bearingsleeve, means positioned centrally with relation to said attrition ringfor projecting air underpressure into said re duction chambertangentially and centrifugally, and a plurality of crushing rollerspivotally suspended upon. said drive head and adapted to act inconjunction with the attrition ring to reduce the raw material.

8. In pulverizing apparatus of the character designated, in combination,a reduc- LOO tion chamber, means for feeding raw mateupon said drivehead, and alternating in position with the crushing rollers, for thepurpose set forth.

9. In pulverizing apparatus of the char acter designated, incombination, a reduction chamber, means for feeding raw materialthereto, a fixed attrition ring positioned, in said reduction chamber,means positioned centrally with relation to said attrition ring forprojecting air under pressure into said reduction chamber tangentiallyand centrifugally, a central bearing sleeve extend ing the verticaladjustment of said plows with relation to the attrition ring andcrushing rollers, for the purpose described.

10. In pulverizing apparatus of the character designated, incombination, a reduction chamber, means for feeding raw materialthereto, a fixed attrition ring positioned in said reduction chamber,means positioned centrally with relation to said attrition ring forprojecting air under pressure into said reduction chamber tangentiallyand .centrifugally, a central bearing sleeve extending therethrough,a-drive shaft and drive head mounted in and on said central bearingsleeve, a plurality of crushing rollers pivotally suspended upon saiddrive head and adapted to act in conjunction with the attrition ring toreduce .the raw material, a plurality of plows suspended upon said drivehead and alternating in position with said crushing rollers, and meansfor effecting the lateral adjustment of said plows with relation to theattrition ring and crushing rollers, for the purpose described.

11. In pulverizing apparatus of the character designated, incombination, a reduction chamber, means for feeding raw mate rialthereto, a fixed attrition. ring positioned in said reduction chamber,means positioned centrally with relation to said attrition ring forprojecting air under pressure into said reduction chamber tangentiallyand centrifugally, a central bearing sleeve extending therethrough, adrive shaft and drive head mounted in and on said centralbearing sleeve,a plurality of crushing rollers pivotally suspended upon said drive headand adapted to act in conjunction with the attrition ring to reduce theraw material, a plurality of plows suspended upon said drive head andalternating in position with said crushing rollers, and means foreffecting both the vertical and lateral adjustment of said plows withrelation to the attrition ring and crushing rollers, for the purposedescribed.

12. In pulverizing apparatus of the character deslgnated, incombination, a reduction chamber, a fixed attrition ring positionedtherein, means for feeding rawmate rial to said reduction chamber, acentral bearlng sleeve extending therethrough, a.

ofcrushing rollers pivotally suspended upon sald drive head and adaptedto act in conjunction with the attrition rin to reduce the raw material,a plurality o plows suspended upon said drive head and alternating inposition with said crushing rollers, means for projecting air underpressure into said reduction chamber centrifugally and tangentiallytoward the direction of travel of said plows and crushing rollers butopposed to the direction of rotation of said crushing rollers, and meansof withdrawing air from said reduction chamber, for the purposedescribed.

13. In pulverizing apparatus of the character designated, incombination, a reduction chamber, a fixed attrition ring positionedtherein, means for feeding raw material to said reduction chamber, acentral bearing sleeve extending therethrough, a drive shaft and drive'head mounted in and on said central bearing sleeve, a plurality ofcrushing rollers pivotallysuspended on said drive head and adapted toact in conjunction with said attrition mill to reduce the raw material,a plurality of plows suspended upon said drive head and alternating inposition with said crushing rollers, an air pressure compartmentunderneath said reduction chamber formed with a central openingthereinto, and means posi tioned centrally with relation to saidattrition ring for projecting the air from said pressure compartmentcentrifugally and tangentially, for the purpose described.

14. In pulverizing apparatus of the character designated, incombination, a reduction chamber, a fixed attrition) ring positionedtherein, means for feeding raw material to said reduction chamber, acentral bearing sleeve extending therethrough, a drive shaft and drivehead mounted in and on said central bearing sleeve, a plurality ofcrushing rollers pivotally suspended on said drive head and adapted toact in contral opening thereinto, and tangential de-,

flectors arranged in conjunction with said central opening, whereby theair from said compression compartment is projected tangentially andcentrifugally into the reduction chamber, for the purpose described.

15. Pulverizing apparatus of the character designated, chamber, afixedattrition ring positioned therein, means for feeding raw material tosaid reduction chamber, acentrfal bearing sleeve extending through saidreduction chamber, a drive shaft and drive head mounted in and on saidcentral bearingcomprising a reduction' sleeve, a non-rotatable spindlesuspended on a rocker bearing having a trunnion shaft journaled on saiddrive head, and a crushing roller rotatably mounted on saidnon-rotatable spindle, and adapted to act in conjunction with saidattrition ring, for the purpose described.

16. Pulverizing apparatus of the character designated, comprising areduction chamber, a fixed attrition ring positioned therein, means forfeeding raw material to said reduction chamber, a central bearing sleeveextending through said reduction chamber, a drive shaft and drive headmounted in and on said central bearing sleeve, a non-rotatable spindlesuspended on a rocker bearing having a trunnion shaft journaled on saiddrive head,and a crushing roller rotatably mounted on said nonrotatablespindle, and adapted to act in conjunction with said attrition ring,said crushing roller consisting of a tire section screwing onto athreaded hub section of a rotatable sleeve mounted on an annularshoulder on said non-rotatable spindle, for the purpose described.

17. Pulverizing apparatus of the character designated, comprising areduction chamber, a fixed attrition ring positioned therein, means forfeeding raw material to said reduction chamber, a central bearing sleeveextending through said reduction chamber, a drive shaft and drive headmounted in and on said central bearing sleeve, a non-rotatable spindlesuspended ona rocker bearing having a trunnion shaft journaled on saiddrive head, and a crushing roller rotatably mounted on said nonrotatablespindle, and adapted to act in described.

18; Pulverizing apparatus of the character designated, comprising areduction chamber, a fixed attrition ring positioned therein, means forfeeding raw material to said reduction'chamber, a central bearing sleeveextending through said reduction chamber, a drive shaft and drive headmounted'in and on said central bearing sleeve, a non-rotatable spindlesuspended on a rocker bearing having a trunnion shaft journaled on saiddrive head, and a crushing roller rotatably mounted on saidnon-rotatable spindle, and adapted to act in conjunction with saidattrition ring, said crushing roller consisting of a tire sectionscrewing onto a threaded conoidal hub section of a rotatable sleevemounted on an annular shoulder on said non-rotatable spindle, the threadconnection between the hub section of said rotatable sleeve and the tiresection of. the crushing roller being reversed in pitch as related tothe direction of rotation of the said crushing roller, for the purposedescribed.

JOSEPH E. KENNEDY.

Witnesses MARGARET L. KINDT, F. E. DOWNING.

